Specifications

DRI-STEEM CRUV Electric Humidifier Installation, Operation, and Maintenance Manual • Page 41
Troubleshooting:
LW series controller and DI/RO water
Table 41-1:
CRUV troubleshooting guide (DI/RO water option)
Problem Possible cause Recommended action
Humidifier will not heat
Control transformer
Verify control voltage across secondary leads of transformer. Reset transformer circuit
breaker.
Humidistat is not calling Set humidistat to call. Inspect for faulty humidistat.
Safety controls open Check safety control. (Airflow switch, high limit humidistat, etc.)
Low water float switch Verify control voltage from float switch and transformer secondary common.
Humidifier will not fill
No water pressure at valve Check manual water supply. Valve, minimum 25 psi water pressure.
Malfunctioning water float valve Check to make sure that valve float & stem moves freely.
Plugged float valve Check float valve seat.
Water float valve does not close
Open drain valve Obstruction in drain valve will not allow complete closure, clean or replace valve.
Manual drain valve not closed Close drain valve.
Malfunctioning float valve Float ball has water leak. Float valve seat defective, replace.
Water passing into overflow stand
pipe
Readjust float valve rod, so water level reaches 1/4" - 3/8" from overflow edge when
water is at ambient or cold state. Excessive water pressure, 80 psi maximum.
Float valve stuck Obstruction will not allow float valve to seat properly, clean or replace with new seat.
Reduced or no output even
though water is at the proper
level
Heater malfunctioning
Verify that proper voltage is being applied to heaters. Check heaters (amp draw and
compare to wiring diagram ratings).
Malfunctioning control system
Heater contactor not functioning, replace. Service fuses blown. Auxiliary limit controls not
allowing system to operate (duct humidistat, airflow proving switch, etc.). Reset, replace,
or calibrate as required. Faulty or inaccurate humidistat, replace or calibrate.
Time delay/interlock relays Relay delay on time is 10-15 seconds. Check relays.
Low water cut-off switch Check for proper operation.
Maintenance
Troubleshooting:
Vapor-logic4 controller
Troubleshooting for CRUV with the optional Vapor-logic4
controller is included in the Vapor-logic4 Installation and Operation
Manual that was shipped with the humidifier.